5. A child’s toy oven uses an incandescent light bulb to bake cookies or cakes. It resembles a conventional oven, except that the heating element is simply a 60 W electric light bulb. a. The light bulb is completely enclosed inside the oven and is barely visible from the outside. Nonetheless energy enters the empty oven in one form and leaves in another. What are these two forms? c. Some that is not a child’s toy is Nitinol. What is that, and how is it affected by temperature that is different from other metals? d. Inside the oven, the light bulb is located just below the food. What heat transfer mechanism carries most of the heat from the bulb to the food? e. If the bulb were above the food rather than below it, what heat transfer mechanism would carry most of the heat from the bulb to the food? It would be mostly radiation. f. The oven’s door locks when the oven is hot. The lock uses a horizontal bimetallic strip. The lower piece of metal in the strip expands more when heated than the upper piece of metal. Which way does the strip curl when the oven is hot? It will curl to U shaped. Solution A)Enters as electrical energy of the filament and leaves as electromagnetic radiation C)It is a nickel- titanium metal alloy with some unique properties. It is also known as Nickel titanium. This alloy exhibits the superelasticity or pseudoelasticity and the shape memory properties. It means this unique metal can remember its original shape and shows great elasticity under stress. Nitinol alloys exhibit two closely related and unique properties: shape memory effect (SME) and superelasticity (SE; also calledpseudoelasticity, PE). Shape memory is the ability of nitinol to undergo deformation at one temperature, then recover its original, undeformed shape upon heating above its \"transformation temperature\". Superelasticity occurs at a narrow temperature range just above its transformation temperature; in this case, no heating is necessary to cause the undeformed shape to recover, and the material exhibits enormous elasticity, some 10-30 times that of ordinary metal D)Radiation mostly some convection too . E)Mostly radiation F)As noted above, different materials expand differing amounts when heated. As an example, brass expands nearly twice as much as steel. If you take a straight strip of brass and bond it to a an strip of steel, you will have what is called a bimetalic strip. When heated, the brass side will expand more than the steel side, and so the entire strip will curve, with the brass on the outside of the curve.

1. 5. A child’s toy oven uses an incandescent light bulb to bake cookies or cakes. It resembles a
conventional oven, except that the heating element is simply a 60 W electric light bulb. a. The
light bulb is completely enclosed inside the oven and is barely visible from the outside.
Nonetheless energy enters the empty oven in one form and leaves in another. What are these two
forms? c. Some that is not a child’s toy is Nitinol. What is that, and how is it affected by
temperature that is different from other metals? d. Inside the oven, the light bulb is located just
below the food. What heat transfer mechanism carries most of the heat from the bulb to the food?
e. If the bulb were above the food rather than below it, what heat transfer mechanism would
carry most of the heat from the bulb to the food? It would be mostly radiation. f. The oven’s door
locks when the oven is hot. The lock uses a horizontal bimetallic strip. The lower piece of metal
in the strip expands more when heated than the upper piece of metal. Which way does the strip
curl when the oven is hot? It will curl to U shaped.
Solution
A)Enters as electrical energy of the filament and leaves as electromagnetic radiation
C)It is a nickel- titanium metal alloy with some unique properties. It is also known as Nickel
titanium. This alloy exhibits the superelasticity or pseudoelasticity and the shape memory
properties. It means this unique metal can remember its original shape and shows great elasticity
under stress.
Nitinol alloys exhibit two closely related and unique properties: shape memory effect (SME) and
superelasticity (SE; also calledpseudoelasticity, PE). Shape memory is the ability of nitinol to
undergo deformation at one temperature, then recover its original, undeformed shape upon
heating above its "transformation temperature". Superelasticity occurs at a narrow temperature
range just above its transformation temperature; in this case, no heating is necessary to cause the
undeformed shape to recover, and the material exhibits enormous elasticity, some 10-30 times
that of ordinary metal
D)Radiation mostly some convection too .
E)Mostly radiation
F)As noted above, different materials expand differing amounts when heated. As an example,
brass expands nearly twice as much as steel. If you take a straight strip of brass and bond it to a
an strip of steel, you will have what is called a bimetalic strip. When heated, the brass side will
expand more than the steel side, and so the entire strip will curve, with the brass on the outside of

2. the curve